vice president joe biden also was officially sworn in at the naval observatory just before 5:30 this morning. the big public celebration will happen tomorrow. coming up in about 20 minutes, our own political analyst larry gerston will join us live from washington, d.c., with more of what we can expect from the president during his second term after the parties have wound down. >>> an elite group of american heroes is set to embark on a pretty important challenge. they already sacrificed on the battlefield, and later this month they will push themselves to the physical limit again to climb mount fill a man jar oh. >> we appreciate it very much. >> reporter: for some the price of war is paid in limbs. and for a few, the heroics extend far beyond the battlefield. >> it's very, very interesting to get a chance to hear their stories. because these folks have been through a lot. >> reporter: the combat wounded veterans challenge aims to capture the special breed of soldier turned survivor, guys like danny swank, willing to still serve the community sharing stories, inspiring generations. >